Delta Electronics VFD-M - Manual (Page 90)

Chapter 4 Parameters|
Revision May 2008, ME14, SW V3.04 4-55
Example 2 (Pr.78 = 02) Continuously executes program cycles:
The diagram below shows the PLC program stepping through each speed and then automatically
starting again. To stop the PLC program, either pause or stop the program. (Refer to Pr.38 to Pr.42
value 17 and 18)
Frequency
60Hz
50Hz
40Hz
30Hz
20Hz
15Hz
10Hz
0Hz
Pr.81
Pr.82 Pr.83 Pr.84
Pr.85
Pr.86 Pr.87
Pr.17
Pr.18
Pr.19
Pr.20
Pr.21
Pr.22
Pr.23
Program step
complete
Program operation
completed
Pr.18
Pr.81 Pr.82
Pr.17
Master freq.=10Hz
Pr.17=10 Hz
Pr.18=20 Hz
Pr.19=40 Hz
Pr.20=60 Hz
Pr.21=50 Hz
Pr.22=30 Hz
Pr.23=15 Hz
Pr.42=16
Pr.45=09
Pr.46=10
Pr.78=01
Pr.79=00
Pr.81=1.0
Pr.82=1.2
Pr.83=1.5
Pr.84=1.5
Pr.85=0.8
Pr.86=1.7
Pr.87=1.7
*
Example 3 (Pr.78 = 03) Execute one cycle step by step:
This example shows how the PLC function can perform one cycle at a time, within a complete cycle.
Each step will use the accel/decel times in Pr.10 to Pr.13. It should be noted that the time interval for
each step may be shorter than expected due to the time required for acceleration and deceleration.
Frequency
60Hz
50Hz
40Hz
30Hz
20Hz
15Hz
10Hz
0Hz
Pr.81 Pr.82
Pr.83
Pr.84
Pr.85
Pr.86
Pr.87
Pr.17
Pr.18
Pr.19
Pr.20
Pr.21
Pr.22
Pr.23
Program step
complete
Program operation
completed
Pr.17=10 Hz
Pr.18=20 Hz
Pr.19=40 Hz
Pr.20=60 Hz
Pr.21=50 Hz
Pr.22=30 Hz
Pr.23=15 Hz
Pr.42=16
Pr.45=09
Pr.46=10
Pr.78=03
Pr.79=00
Pr.81=1.0
Pr.82=1.2
Pr.83=1.5
Pr.84=1.5
Pr.85=0.8
Pr.86=1.7
Pr.87=1.7
*
Note: operating time for each step is 10 times
the settings of Pr.81 to Pr.87.
t t t t t t t